Signments



(No' ModeL) 2 Sheets-Sheet 1.

J. FAHNESTOGK. METALLIC PRINTING 131.001; FOR ELEGTROTYPE AND STEREOTYPE PLATES.

No. 356,998. Patented Febt 1, 1887..

uzgq/i N. PETERS. PholOUthogT-alrheli Wz'lhlnglon. D. C.

no Model.) -2 Shets-Sheet 2.

J-. FAHNESTOOK. METALLIC PRINTING BLOCK FOR ELEG'IROTYPB AND STEREOIYPE PLATES; No. 356,993. Patented F eb. 1, 1887.

v WITNESSES: INVBNTOR:

, ATTORNEYS.

N. FEI'ERS. Fhmoulhognphur. Wahihgion, 0.1;

UNITED STAT S 1 PATENT OFFICE. I

. JoHN FAHNESTO-OK, or BROOKLYN, ASSIGNOB, BY DIRECT AND MEsNH As- SIGNMENTS7'TO JOHN M. HAWKES,

GUSON, on BROOKLYN, N. Y.

013 NEW YORK, AND JAMES H. FER- METALLIC PRINTING-BLOCK FOR ELECTROTYPE AND STEREOTYPE PLATES.

, SPECIFICATION forming part of Iietters Patent No. 356,993, dated February 1,1887.

Application filed August 27, 1885. Serial No. 175,453. (No model.)

To all whom it 17mg concern.-

Be it known that I, J oHN FAHNESTOGK, a citizen of the United States, residing at Brooklyn, in the countyof Kings and State of New York, have invented a new and useful Improvement in Metallic Printing Blocks for Electrotype and Stereotype Plates, of which the following is a specification.

The object of my invention is to provide a IO which electrotype and stereotype plates can be firmly locked in position or released from the sameat'the will of the operator.

The invention consists of clamps fixed on the is block, and of movable clamps which are simultaneouslyactuated by a key applied to a post mounted in the said block. The invention alsoconsists of various parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claim.

Reference is to be had to the accompanying drawings, forming apart of this specification, in which similar letters of reference indicate corresponding parts in-all the figures.

Figure l is a bottom view of a duodecimoblock provided with myimprovement. Fig. 2 is a sectional side view of the same on the line a: m of Fig. 1. Fig. 3 is a sectional end view of the same on the line 3 y of Pig. 1. Fig. 4 is a sectional side view of the same on the line 2 z of Fig. 1. Fig. 5 is asectional end view of the same on the line w w of Fig. 1, and Fig. 6 is a plan view of the block.

The printing-block A, of suitable size and form, is provided on its upper face, on one side and on one end, with two, three, or more fixed clamps, B. On the other side and the other end of the block A are placed two or more upper surface of the block and move in grooves D, cut in the said block A. The movable clamps'O are attached to one end of the rods E, E, and E, respectively, which are adapted to slide in suitable bearings in the block A, and are each provided with one or more sprin gs, F, which have the tendency to move the clamps O, with their respective rods E, E, and E, in-

ward. The springsF are attached in various 5oways to the said rods E, E, and E, as shown new and improved metallic printing-block in:

movable clamps, O, which project above the in the drawings. The rods E, E, and E receive a simultaneous movement by means of a key, which turns a post, G, placed, preferably, in one corner of the block A, and provided with an arm, H, which is pivotally connected with the pitman I, provided with a toggle-joint, of which the arm J is pivotedto the rod E, while the other arm, J, is pivoted to the block A. With the pitman I is also connected a rack-bar, K, which meshes into the pinion L, suitably mountedin the block Aand actuating a cam, M. which imparts a sliding motion to the rod E. The arm His also pivotally connected with the pitman N, provided with a toggle-joint, of which the arm 0 is pivotally connected with the rod E while the other arm, 0, is pivoted to the block A.

The key employed for operating the clamps O is preferably a-square standard having a cross-handle fitting into a square recess in the post G.

The operation is as follows: In the position shown in thefigures the movable clamps are in their inner or closed position, holding the plate firmly in place on the face of the block A. If the key is now inserted in the square aperture of the post Gr from the face of'the block and is turned, the arm H swings in the direction of the arrow at, whereby the rods E and E are moved sidewise in the direction of the arrow 1) by the action of the pitman I and the arm J of the toggle-joint connected with the rod E, and by the rack-bar K turning the pinion L, which causes the cam M to act on the rod E. The swinging of the arm H also causes the rod E to move lengthwise in the direction of the arrow 0 by the action of the pitman N on the arms 0 and O of the togglejoint connected with the said rod E", and this simultaneous movement of therods E, E, and E compresses their respective springs F. The key is turned untilone edge of the arm Hrests on the side of theblock A, as shownin dotted lines in Fig. 1, 'so that the arm H by its pitman I throws the arms J J of the toggle-joint apart beyond their center line, and a similar ,motion is imparted to the arms 0 and O"of the toggle-joint by the pitman N, so that the compressed springs F cannot force the arm H trary, presses on the arm H in the direction of the arrow a, thereby leaving the clamps G in an open position, even if all pressure 011 the key and post Gceases. The clamps O are now in their outermost position, near the edges of the block A, and the electrotype-plate can now be placed on the face of the block, and when the key is turned in the opposite direction, so as to cause the arm H to swing in the inverse direction of the arrow a until the arms J and J and O and O of the toggle-joints pass their center line again, thesprings F will force the respective rods E, E, and 13' back to their former position in the inverse directions of the arrows b and c, and thereby the movable clamps G will be caused to grip the plate and hold the same tight against the stationary clamps B, as indicated in Fig. 6.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- I The combination of a metallicprinting-block and its movable clamps with a post mounted on the said block, and attached arms, pitmen, and connections, whereby all the movable clamps are simultaneously actuated by a key applied to the said post substantially as shown and described.

JOHN FAHNESTOCK. XVitnesses:

GI-IAs. 0. SMITH, C. W. PERRY. 

